code: def test_constant_sum(self):
      # non-contiguous should raise error
      x = np.arange(6, dtype=np.float64)[::2]
      pytest.raises(ValueError, self.module.foo_sum, x)
  
      # check values with contiguous array
      x = np.arange(3, dtype=np.float64)
      self.module.foo_sum(x)
      assert np.allclose(x, [0 + 1 * 3 * 3 + 2 * 3 * 3, 1 * 3, 2 * 3])
  
file_path: numpy/numpy/f2py/tests/test_parameter.py
imports: import os
  import pytest
  import numpy
  from .None import util
label_desc: Use image node_id 9 for calling the TestParameters obj's underlying member method code with example usage: obj.test_constant_sum() without return types